Finding the Fourth Proportional to 78,485.83, 108,308.90 and 42,675.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.83 : 108,308.90 = 42,675.53 : x
2. Step 2: Convert to fraction form
   78,485.83/108,308.90 = 42,675.53/x
3. Step 3: Cross multiply
   78,485.83x = 108,308.90 × 42,675.53
4. Step 4: Simplify right side
   78,485.83x = 4,622,139,276.36
5. Step 5: Solve for x
   x = 4,622,139,276.36/78,485.83
6. Step 6: Final answer
   x = 58,891.39